For her to have married by the 1794 birth of her daughter AND be the daughter of Moses and Lavina (who didn't hook up until 1778), she would have been 15 at her marriage. Quite possible especially since her own mother married at 16.

That she may have been Moses and Lavina (Doolittle) Hix's daughter is supported by the fact that the Hicks property in Hoosick was near the Felshaw property (and Sarah Hix married Lemuel Felshaw). In addition, she may have been one of the four females enumerated with Moses Hicks in the 1790 US Census (Hoosick, NY).

"I found three area wives named Hix and one Hicks family in the area, and suggested they might be one family since the dates and neighborhoods seemed to work." [Felshaw property close to Hix property.]